Publishing for Linkedin is sometimes frustrating, you can either have a post with text and one image, or a pdf document that is shown as a slideshow.
But this pdf document must be correctly formatted to display well across devices. For this reason, I added a CSS print style. Press the print button next to an article and then, in the browser, save as pdf. Make sure to disable page headers.
I write my articles in Markdown with Latex and mainly SVG type pictures. Markdown support formfeed’s so it’s easy to tailor the slideshow.